package com.itheima.stock.helper;

import com.google.common.util.concurrent.RateLimiter;
import com.itheima.stock.enums.CodeEnum;
import com.itheima.stock.response.ResponseResult;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Aspect
@Component
@SuppressWarnings("all")
public class LimiterAspect {
    @Autowired
    private RateLimiter rateLimiter;
    @Pointcut(value = "@annotation(com.itheima.stock.annotation.Limiter)")
    public void pt() {}

    @Around(value = "pt()")
    public Object limiter(ProceedingJoinPoint pjp) throws Throwable {
        //流量
        boolean flag = rateLimiter.tryAcquire();
        if (flag){
            return pjp.proceed();
        }else {
           return ResponseResult.error(CodeEnum.OVER_CONCURRENT_NUM);
        }
    }









}
